About: Class B star   Sponge Permalink

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A Class B star is the second-brightest type of main sequence star. They are typically colored blue-white, slightly less blue than O-type stars. They are fairly rare, making up only 0.13% of main-sequence stars. A typical Class B star has a mass of 9 (2 to 16) solar masses, a radius of 4 (2 to 7) solar radii, a luminosity of 1,000 (25 to 30,000) solar luminosities, a surface temperature of 20,000 K (10,000 K to 30,000 K), and a lifespan of 40 million years.

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  • Class B star
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  • A Class B star is the second-brightest type of main sequence star. They are typically colored blue-white, slightly less blue than O-type stars. They are fairly rare, making up only 0.13% of main-sequence stars. A typical Class B star has a mass of 9 (2 to 16) solar masses, a radius of 4 (2 to 7) solar radii, a luminosity of 1,000 (25 to 30,000) solar luminosities, a surface temperature of 20,000 K (10,000 K to 30,000 K), and a lifespan of 40 million years.
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  • A Class B star is the second-brightest type of main sequence star. They are typically colored blue-white, slightly less blue than O-type stars. They are fairly rare, making up only 0.13% of main-sequence stars. A typical Class B star has a mass of 9 (2 to 16) solar masses, a radius of 4 (2 to 7) solar radii, a luminosity of 1,000 (25 to 30,000) solar luminosities, a surface temperature of 20,000 K (10,000 K to 30,000 K), and a lifespan of 40 million years. The habitable zone of a typical Class B star is on the order of 50 AU. While they also possess short lifespans, making planets and life rare, there are a few examples of B-type star systems, including HIP 78530.
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